diff --git a/include/linux/file.h b/include/linux/file.h
index da84fa0..6239591 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -31,6 +31,7 @@
 extern struct file *fget_raw(unsigned int fd);
 extern struct file *fget_raw_light(unsigned int fd, int *fput_needed);
 extern int f_dupfd(unsigned int from, struct file *file, unsigned flags);
+extern int replace_fd(unsigned fd, struct file *file, unsigned flags);
 extern void set_close_on_exec(unsigned int fd, int flag);
 extern bool get_close_on_exec(unsigned int fd);
 extern void put_filp(struct file *);